[PATCH] matrox maven: memory allocation and other cleanups

A few cleanups which were done to almost all i2c drivers some times
ago, but matroxfb_maven was forgotten:

* Don't allocate two different structures at once.
* Use kzalloc instead of kmalloc+memset.
* Use strlcpy instead of strcpy.
* Drop duplicate error message on client deregistration failure.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/video/matrox/matroxfb_maven.c b/drivers/video/matrox/matroxfb_maven.c
index 531a0c3..d8b3429 100644 (file)
--- a/drivers/video/matrox/matroxfb_maven.c
+++ b/drivers/video/matrox/matroxfb_maven.c
@@ -129,7 +129,7 @@ static int get_ctrl_id(__u32 v4l2_id) {
 
 struct maven_data {
        struct matrox_fb_info*          primary_head;
-       struct i2c_client*              client;
+       struct i2c_client               client;
        int                             version;
 };
 
@@ -970,7 +970,7 @@ static inline int maven_compute_timming(struct maven_data* md,
 
 static int maven_program_timming(struct maven_data* md,
                const struct mavenregs* m) {
-       struct i2c_client* c = md->client;
+       struct i2c_client* c = &md->client;
 
        if (m->mode == MATROXFB_OUTPUT_MODE_MONITOR) {
                LR(0x80);
@@ -1007,7 +1007,7 @@ static int maven_program_timming(struct maven_data* md,
 }
 
 static inline int maven_resync(struct maven_data* md) {
-       struct i2c_client* c = md->client;
+       struct i2c_client* c = &md->client;
        maven_set_reg(c, 0x95, 0x20);   /* start whole thing */
        return 0;
 }
@@ -1065,48 +1065,48 @@ static int maven_set_control (struct maven_data* md,
                  maven_compute_bwlevel(md, &blacklevel, &whitelevel);
                  blacklevel = (blacklevel >> 2) | ((blacklevel & 3) << 8);
                  whitelevel = (whitelevel >> 2) | ((whitelevel & 3) << 8);
-                 maven_set_reg_pair(md->client, 0x0e, blacklevel);
-                 maven_set_reg_pair(md->client, 0x1e, whitelevel);
+                 maven_set_reg_pair(&md->client, 0x0e, blacklevel);
+                 maven_set_reg_pair(&md->client, 0x1e, whitelevel);
                }
                break;
                case V4L2_CID_SATURATION:
                {
-                 maven_set_reg(md->client, 0x20, p->value);
-                 maven_set_reg(md->client, 0x22, p->value);
+                 maven_set_reg(&md->client, 0x20, p->value);
+                 maven_set_reg(&md->client, 0x22, p->value);
                }
                break;
                case V4L2_CID_HUE:
                {
-                 maven_set_reg(md->client, 0x25, p->value);
+                 maven_set_reg(&md->client, 0x25, p->value);
                }
                break;
                case V4L2_CID_GAMMA:
                {
                  const struct maven_gamma* g;
                  g = maven_compute_gamma(md);
-                 maven_set_reg(md->client, 0x83, g->reg83);
-                 maven_set_reg(md->client, 0x84, g->reg84);
-                 maven_set_reg(md->client, 0x85, g->reg85);
-                 maven_set_reg(md->client, 0x86, g->reg86);
-                 maven_set_reg(md->client, 0x87, g->reg87);
-                 maven_set_reg(md->client, 0x88, g->reg88);
-                 maven_set_reg(md->client, 0x89, g->reg89);
-                 maven_set_reg(md->client, 0x8a, g->reg8a);
-                 maven_set_reg(md->client, 0x8b, g->reg8b);
+                 maven_set_reg(&md->client, 0x83, g->reg83);
+                 maven_set_reg(&md->client, 0x84, g->reg84);
+                 maven_set_reg(&md->client, 0x85, g->reg85);
+                 maven_set_reg(&md->client, 0x86, g->reg86);
+                 maven_set_reg(&md->client, 0x87, g->reg87);
+                 maven_set_reg(&md->client, 0x88, g->reg88);
+                 maven_set_reg(&md->client, 0x89, g->reg89);
+                 maven_set_reg(&md->client, 0x8a, g->reg8a);
+                 maven_set_reg(&md->client, 0x8b, g->reg8b);
                }
                break;
                case MATROXFB_CID_TESTOUT:
                {
                        unsigned char val 
-                         = maven_get_reg (md->client,0x8d);
+                         = maven_get_reg(&md->client,0x8d);
                        if (p->value) val |= 0x10;
                        else          val &= ~0x10;
-                       maven_set_reg (md->client, 0x8d, val);
+                       maven_set_reg(&md->client, 0x8d, val);
                }
                break;
                case MATROXFB_CID_DEFLICKER:
                {
-                 maven_set_reg(md->client, 0x93, maven_compute_deflicker(md));
+                 maven_set_reg(&md->client, 0x93, maven_compute_deflicker(md));
                }
                break;
        }
@@ -1185,7 +1185,6 @@ static int maven_init_client(struct i2c_client* clnt) {
        MINFO_FROM(container_of(clnt->adapter, struct i2c_bit_adapter, adapter)->minfo);
 
        md->primary_head = MINFO;
-       md->client = clnt;
        down_write(&ACCESS_FBINFO(altout.lock));
        ACCESS_FBINFO(outputs[1]).output = &maven_altout;
        ACCESS_FBINFO(outputs[1]).src = ACCESS_FBINFO(outputs[1]).default_src;
@@ -1243,19 +1242,17 @@ static int maven_detect_client(struct i2c_adapter* adapter, int address, int kin
                                              I2C_FUNC_SMBUS_BYTE_DATA |
                                              I2C_FUNC_PROTOCOL_MANGLING))
                goto ERROR0;
-       if (!(new_client = (struct i2c_client*)kmalloc(sizeof(*new_client) + sizeof(*data),
-                       GFP_KERNEL))) {
+       if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) {
                err = -ENOMEM;
                goto ERROR0;
        }
-       memset(new_client, 0, sizeof(*new_client) + sizeof(*data));
-       data = (struct maven_data*)(new_client + 1);
+       new_client = &data->client;
        i2c_set_clientdata(new_client, data);
        new_client->addr = address;
        new_client->adapter = adapter;
        new_client->driver = &maven_driver;
        new_client->flags = 0;
-       strcpy(new_client->name, "maven client");
+       strlcpy(new_client->name, "maven", I2C_NAME_SIZE);
        if ((err = i2c_attach_client(new_client)))
                goto ERROR3;
        err = maven_init_client(new_client);
@@ -1279,12 +1276,10 @@ static int maven_attach_adapter(struct i2c_adapter* adapter) {
 static int maven_detach_client(struct i2c_client* client) {
        int err;
 
-       if ((err = i2c_detach_client(client))) {
-               printk(KERN_ERR "maven: Cannot deregister client\n");
+       if ((err = i2c_detach_client(client)))
                return err;
-       }
        maven_shutdown_client(client);
-       kfree(client);
+       kfree(i2c_get_clientdata(client));
        return 0;
 }